Current Organic Chemistry - Volume 17, Issue 1, 2013

In recent years, microcapsules have found diverse applications in many areas of science and technology. The inherent advantages of microcapsules, such as small size, high surface area, large inner volume, selectivity, and tunability, have led to applications for tailored microcapsules as drug delivery vehicles, microreactors, catalyst supports, and encapsulants. This review provides an overview of the co Read More

Microencapsulation is a technique devoted to entrapping core material inside one or more polymeric coatings. Cyclodextrins (CDs) and its various derivatives are used as functional building blocks because of their unique physical properties. As well CDs possess, the ability to form well-defined host/guest inclusion complexes with lipophilic guests in aqueous solution or polar organic solvents. This review covers literature over the Read More

The applications of polysulfone (PSf) microcapsules have been increasing in the last years. The main reason for using PSf as a capsule shell is due to the high chemical and physical stability that this material possesses. In addition, it is a well-known polymer, broadly used by industries and moreover, it is a non-toxic and biocompatible functional material that may be employed for medical and biological applications. Polysulf Read More

Miniemulsion is a promising technology to prepare capsules taking advantage of its droplet nucleation and absence of molecular net diffusion between droplets. The versatile shell materials of capsules can be obtained via a normal free radical polymerization, controlled/ living radical polymerization, anionic polymerization, polyaddition, polycondensation of organic and inorganic precursors or coordination polymerizati Read More

Combination of the advantages of the surface-initiated atom transfer radical polymerization (SI-ATRP) and template-based techniques, the SI-ATRP from colloidal templates approach could be applied to fabricate the controllable-structured polymeric nanocapsules. The different crosslinking techniques, such as chemical crosslinking, ultraviolet (UV)-induced photo-crosslinking, and one-pot surface- initiated atom transfer radic Read More

Colloidal Microcapsules (MCs) are hollow micron/sub-micron size spherical constructs composed of nanoparticle-based shells. Recent years have witnessed various strategies towards the fabrication of stable colloidal MCs since they find applications in many areas of material and biological sciences e.g. drug delivery, encapsulation and microreactors. The inherent instability of nanoparticles (NPs) at the interface due to ther Read More

An ideal drug must be absolutely inert in normal conditions, providing release of active compounds only in diseased areas. Nanoengineered polymeric capsules have required features. We describe here basic methods for the fabrication of such containers and give some particular examples of their use when the drug release is triggered by the presence of the disease itself or by the soft external action, with no side Read More

Electric Field Assisted Capillarity (EFAC) is a novel manufacturing technique that allows for the one-step fabrication of enclosed microstructures, such as microchannels and microcapsules. After a brief review of current micro-encapsulation techniques, this paper presents a list of potential applications for this technology; what is currently known about its mechanisms and avenues for further research

This work deals with the catalytic conversion of alcohols to aldehydes using a new support-nanocatalyst system consisting of chromium trioxide supported on nanostructured hydroxyapatite (Cr-NHAP). The oxidation reaction was carried out on a series of substituted benzylic alcohols under solvent-free microwave irradiation conditions. The obtained results showed high selectivity and high yield that was found to depend on t Read More

Ionic liquids are often used together with dichloromethane in different reactions. This combination can be problematic because the use of ionic liquids with a carboxylic acid as an anion and dichloromethane can lead to the formation of methylene diesters. The reaction of trioctylmethylammonium benzoate with dichloromethane was studied, where the ionic liquid acted as reactant, solvent and catalyst. Th Read More

This paper reports a comparative study on the influence of solvent systems on its structure, properties and electromechanical behavior of cellulose electro-active paper. Three types of solvent systems, namely N,N’-dimethylacetamide (DMAc)/LiCl, Trifluoroacetic acid (TFA) and 1-butyl-3-methylimidazolium chloride (BMICL) were studied to dissolve cellulose. Regenerated cellulose from DMAc/LiCl showed the best thermal a Read More